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Materials for displays, liquid crystal alignment agents, and liquid crystal display elements

A technology of liquid crystal alignment agent and display, applied in the direction of liquid crystal materials, instruments, chemical instruments and methods, etc., can solve problems such as unevenness, ODF uneven display, etc., and achieve favorable product yield, excellent vertical alignment limit force, high durability The effect of ultraviolet rays

Active Publication Date: 2015-10-07
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the ODF method is adopted in the manufacture of a conventionally known VA-type liquid crystal display element including a liquid crystal alignment film, there is an abnormal phenomenon that a display unevenness called "ODF unevenness" occurs

Method used

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  • Materials for displays, liquid crystal alignment agents, and liquid crystal display elements
  • Materials for displays, liquid crystal alignment agents, and liquid crystal display elements
  • Materials for displays, liquid crystal alignment agents, and liquid crystal display elements

Examples

Experimental program
Comparison scheme
Effect test

example

[0574] Hereinafter, the present invention will be explained more specifically through examples, but the present invention is not limited to these examples.

[0575] In the following examples, the weight average molecular weight Mw is a polystyrene conversion value measured by gel permeation chromatography under the following conditions.

[0576] Column: manufactured by Tosoh Co., Ltd., TSKgelGRCXLII

[0577] Solvent: Tetrahydrofuran

[0578] Temperature: 40℃

[0579] Pressure: 68kgf / cm 2

[0580]

Synthetic example S-1-1

[0582] A 200 mL three-necked flask with a thermometer was charged with AC-SQ TA100 (hydrolysis condensate of 3-acryloxypropyltrimethoxysilane, manufactured by Toagosei Co., Ltd.) 33.0 g, thioglycolic acid 9.2 g (relative to AC -SQ TA100 has a silicon atom equivalent to 50 mol%), 42.3 g of acetonitrile, and 20.2 g of triethylamine, and reacted at 50°C for 1 hour. After the reaction, the solvent in the system was replaced with butyl cellosolve (BC), thereby obtaining 195 g of a solution containing about 20% by weight of polyorganosiloxane (S-1-1).

[0583] The Mw of this polyorganosiloxane (S-1-1) was 5,200.

[0584] Synthesis example S-1-2 and synthesis example S-1-3

[0585] In the above Synthesis Example S-1-1, the amount of thioglycolic acid used was set as described in Table 2, and stearyl mercaptan in the amount described in Table 2 was further added at the time of charging. Example S-1-1 was carried out in the same manner to obtain polyorganosiloxane (S-1-2) and polyorganosilo...

Synthetic example E-1

[0593] A reaction vessel equipped with a stirrer, a thermometer, a dropping funnel, and a reflux condenser is charged with 250 g of 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane (ECETS) as a silane compound (equivalent to 50 mol) %) and 252g of 3-methacryloxypropyltrimethoxysilane (MTMS) (equivalent to 50mol%), 502g of methyl isobutyl ketone as a solvent, and 50g of triethylamine as a catalyst, at room temperature Mix under. Next, after 402 g of deionized water was dropped in a dropping funnel for 30 minutes, the mixture was stirred at 80° C. under reflux to perform the reaction for 6 hours. After the reaction, the organic layer was taken out and washed with a 0.2% by weight ammonium nitrate aqueous solution until the washed water became neutral, and then the solvent and water were distilled off under reduced pressure to obtain a viscous transparent liquid The polyorganosiloxane EPS-1 with epoxy structure.

[0594] The Mw of this polyorganosiloxane EPS-1 was 2,900.

[0595] Synth...

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Abstract

The invention provides a display material, a liquid crystal alignment agent, a liquid crystal display device and a manufacturing method thereof. The object of the present invention is to provide the liquid crystal alignment agent capable of acquiring excellent vertical orientation and possessing high UV resistance. The liquid crystal alignment agent includes at least polysiloxane and a solvent, and is characterized in that: the solvent includes a compound as shown in the following formula (S1): R10O-((CR112)m1-O)m2-H (S1), wherein R10 is phenyl or benzyl, the phenyl or the benzyl can also be substituted by halogen atoms, cyano groups, and C1-C4 alkyl, R11 is a hydrogen atom or a C1-C8 alkyl, m1 is an integer of 2-8, m2 is an integer of 1-4, a plurality of R11 may be identical or different from each other, and in case of a plurality of m1 s, the plurality of m1 may be identical or different from each other.

Description

Technical field [0001] The invention relates to a material for displays, in particular to a liquid crystal alignment agent. In more detail, it relates to a liquid crystal alignment agent that can obtain a liquid crystal alignment film having excellent vertical alignment and high ultraviolet resistance. Background technique [0002] As liquid crystal display elements, in addition to the use of twisted nematic (TN) type, super twisted nematic (Super Twisted Nematic, STN) type, etc. represented by the horizontal alignment of nematic liquid crystals with positive dielectric anisotropy In addition to the liquid crystal display element of the mode, a vertical alignment (VA) liquid crystal display element of a homeotropic alignment mode using nematic liquid crystals with negative dielectric anisotropy is also known. [0003] Such a liquid crystal display element includes a liquid crystal alignment film having a function of aligning liquid crystal molecules in a certain direction. As the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/56G02F1/1337G02F1/1333
CPCC08L83/04C09K19/56G02F1/133711G02F1/133788
Inventor 清水成夫平野哲川又俊友山边敦美石川晓
Owner JSR CORPORATIOON
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